Linux net sharing is a very simple method .First you configure 2 network cards
eth0 is first network card connect Internet to this card and configure static ip address
eth1 is second card connect this card to your LAN network give ip address is 192.168.0.1
step 1. enabling packet forwaring
log in as root
edit vi /etc/sysctl.conf
add this line to enable packer forwarding ip 4 net.ipv4.conf.default.
save and restart network
step 2. ip masquerading
give this commad iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
service iptables save
service iptables restart………….
now you done internet sharing
step 3 xp configuration
take lan card properties in xp
give ip address 192.168.0.XXX
and default gate way give linux pc ip 192.168.0.1
dns preferred same as isp
dns alternate same as isp
app lay ok and check the Internet
